Actually, I don't think you'll ever have to (at least not with the current games). With the Dream Radar, once you send over the research data via 3DS, you can still RNG the Pokémon on any model of DS.
I was just wondering because I had a question about 3DS RNG that I was hoping someone experienced could help me with.
I was just wondering because I had a question about 3DS RNG that I was hoping someone experienced could help me with.